Abstract
We present investigations on the preparation of lithium niobate, LiNbO3 nanoparticles using high energy ball-milling. Stoichiometric composition of LiNbO3 powder was prepared by solid-state reaction method and used for ball-milling. Various milling parameter were optimized to get required particle sizes. Synthesized nanoparticles were characterized for their structure and particle sizes using X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and dynamic light scattering (DLS) techniques. The UV-Visible transmission shows the blue shift in cutoff, which indicate nearly stoichiometric composition of the prepared material. It has been observed that the sizes of particles decreases with increasing milling speed and time. Observed particle sizes were found in the range ~30-60 nm.
Highlights
Lithium niobate, LiNbO3 crystal is one of the most versatile synthetic materials
In this paper we report the preparation of lithium niobate, LiNbO3 nanoparticles by high energy ball milling
These LN nanoparticles were suspended in de-ionized water homogeneously by several stirring followed by ultrasonication and the particle size distribution was determined by dynamic light scattering, DLS (Zetasizer Nano ZS90; ZEN-3690)
Summary
LiNbO3 crystal is one of the most versatile synthetic materials It is negative uniaxial, highly birefringent and has remarkable combination of piezoelectric and optical properties. Polycrystalline LiNbO3 nanotubes have been reported [20] as well as a solution-phase synthesis to produce rod like structures among other multiple structures [21]. This enhancement is related to larger drift length of the photo-holes (lifetime) due to trapping of electrons on the nanoparticles and creation of recombination barrier at the polymer/nanoparticle interface at higher nanoparticle concentration. In this paper we report the preparation of lithium niobate, LiNbO3 nanoparticles by high energy ball milling. The results on nano-scale material were compared with their bulk counterpart
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